A Multiple Merger Model for the Origin of Ultraluminous Infrared Galaxies | Zendy

Yoshiaki Taniguchi | Zendy; Yasuhiro Shioya | Zendy

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A Multiple Merger Model for the Origin of Ultraluminous Infrared Galaxies

Author(s) -

Yoshiaki Taniguchi,

Yasuhiro Shioya

Publication year - 1998

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/311473

Subject(s) - physics , astrophysics , galaxy , luminous infrared galaxy , quasar , infrared , peculiar galaxy , active galactic nucleus , disc , nucleus , galactic nuclei , astronomy , galaxy formation and evolution , disc galaxy , biology , microbiology and biotechnology

It has been often considered that the dissipative collapse caused by a mergerof two gas-rich galaxies is responsible for the intense nuclear starbursts orthe nonthermal quasar activity in ultraluminous infrared galaxies due to theefficient fueling induced by it. It is also widely known that UltraluminousInfrared Galaxies (ULIGs) are often found in merging systems. Some ULIGs, suchas Arp 220, show two compact starburst regions which are considered to beassociated with two galactic nuclei in the process of merging. However, since amerger between two galaxies may make only one compact starburst region, wesuggest the possibility that double-nucleus ULIGs are composed of two mergingnuclei, each of which contains a couple of galactic nuclei.Comment: 13 pages with two figures. To appear in THE ASTROPHYSICAL JOURNAL (Letters

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